Warp stop-motion for looms.



S. S. JACKSON.

WARP STOP MOTION FOR LOOMS;

APPLICATION FILED MAR. 13. 1915.

Wa'tneases; I lizvenior @flCa/i 1. 1M 5 went 0% .am im My W cfli'orney.

STATES PATENT OFFTOE,

SIMEON' S. JACKSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE STAFFORDCOMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATIONOF NEW JERSEY.

WARP STOP-1VOTION non LOOIVIS.

Specification of Letters Patent.

Patented Sept. Jlfl, 1917.

To all whom it may concern a subject of Great Britain, residing atReadville, Boston, in the county of Suffolk, State of Massachusetts,haveinvented a certain new and useful Improvementin Warp Stop- Motionsfor Looms, of which the following is a specification, reference beinghad therein to the accompanyingdrawmgs.

My invention is designed more particularly for employment in connectionwith fine warps having. a considerable number of ends to the inch. Onegeneral object of the invention isto provide for splitting thewarp-threads, i. e. separating them from union with one another, and toprevent them from either remaining united to one another or becomingjoined or knit together in their progress through the loom." Byaccompl1shing this objectI eliminate chafing and wear of thewarp-threads, and greatly reduce the number of breakages thereof.Another object is to render the individual warp threads readilytraceable back to the dropwires, so as'to enable repairs to thewarpthreads to be effected easily. Other objects are to reduce crowding.at the dropwires and thereby reduce chafing, and to facilitate access tothe drop-wires and Warp threads.

An embodiment of the invention is illus trated in the drawings, in whichlatter,

Figure 1 is a view showing certain portions of a loom in section in avertical plane extending from front to rear in the loom, with the saidembodiment applied thereto. F 2 is aplan view of the parts that areshown in Fig. 1.

Having reference to the drawings,-

A portion of the breast-beam of a loom is shown at 1, and a portion ofthe lay-beam at 2. A portion of one lay-sword is shown at 3, Fig. l. Thereed carried by the lay is indicated at 4L, Fig. 1, the lay-cap orhandrail beingmarked 4 and Fig. 1 shows a shuttle 5 upon the lay-beam.Harnessframes are shownat 6, 6*, 6 6. Warp threads (4, a a 0?, are shownextending from the rear of the 100m through the eyes of the heddlesmounted in said harness;- frames, and through the dents of the reed 4,to the fell, where they are united in the web 7 produced by thecombination of the warp-threads with the weft-thread which is interwoventherewith by means of the shuttle 5.

The drop-wires 8, 8, of the warp-stopmotion are hung uponthewarp-threads between two transversely-extending rods 9, 9", and in thisinstance the said drop-wires are disposed in two banks which are guidedby their guide-bars 10, 10. The rear dropwires, 8, are hung uponwarp-threads eX- tending over both of the said rods. The frontclrop-wires, 8, are hung upon warpthreads which pass over the rear rod9, and under the front rod, 9 At 11 is a warprest located between thetwo banks of dropwires and below the warps. Those por tions oftheawarp-stop-motion which coiiperate with the drop-wires in indicatingthe breaking. or excessive slaekness of the individual warp-threads, andin bringing about the arrest of the working of the loom, are not shown.They may be of any approved character.

In carrying my invention into effect. the entire series of warp-threadsis arranged to pass over the rear (right-hand) rod 9, and to restthereon. One half of thewarpthreads of the saidseries pass over thefront (left-hand) rod, 9 and the other half below the same. In arrangingthe threads over and under the front rod 9 they are disposed two by two.That is to say, two threads are disposed above the said'rod 9 the nexttwo below the same, the next two above the same, the next two below, andso 011 alternately. The warp-threads also are drawn two by two throughthe drop-wires of the two banks. That is to say, two threads whichlieside by side at the same side of the front rod 9 respectively are drawnthrough two drop-wires located side by side in one bank.

The warp-threads which are drawn two by two through adjoining pairs ofthe dropwires as just explained, and are disposed in alternating pairslocated above and below the left-hand rod 9 are drawn through theheddle-eyes of the harnessframes in an on der which splits and separatesfrom each other the individual threads composing every pair ofwarp-threads. Thus, one thread of each pair is drawn through aheddle-eye of a harness-frame pertaining to one of the planes of theshed that is formed for the receptlon of the weftthreads, while theother warpthread of.

front rod 9 extend forward to the harness I.

frames along different lines, at all times except when theharness-frames are exactly even. In addition, the individual warpthreadsare readily traceable back to the drop-wires, so that repairs to thethreads are easily effected, and the grouping of the drop-Wires reducescrowding and chafing, and facilitates access to the drop-wires andwarp-threads. These are the particular obj ects of the invention. In thedrawings four harness-frames are shown. It is to be understood that inpractice they are coupled or connected together to work in pairs forplainweaving. The warp-threads are drawn in 1, 3, 2, 4:; 1, 3, 2, aorder through the heedle-eyes of the said harness-frames. It will beobserved that one warp-thread, a, of a given pair of warp threads,passes from the bottom of the left-hand rod 9, to a heddle-eye of thefirst harness-frame, 6, counting from the rear of the loom, while theadjoining thread, a of the same pair passes from the bottom of the saidrod through a heddle-eye of the third harnessframe, 6', also countingfrom the rear. These two threads, therefore, are caused to form parts ofthe opposite planes of the shed represented in Fig. 1, and when the shedis open they diverge from each other from the rod 9 forward. It willalso be observed that one thread, (4 from the top of the left-hand rod 9passes through a heddle-eye of the second harness-frame, 6 counting fromtherear, while the adjacent thread, 65*, of the same pair passes fromthe top of the said rod 9" through a heddleeye of the fourth or frontharnessframe, 6, so that the two threads of this pair form parts of theopposite planes of the open shed. Thus, between the left-hand rod 9'"and the harness-frames the warp -threads are divided into four planesinstead of remaining either in a single plane or in two planes asheretofore usual. In the case of the shed-formation that is representedin Fig. 1, the threads a which pass from the under side of the left-handrod 9 to the third harness-frame, 6 counting from the rear, and thethreads a that pass from the top side of the said rod to the secondharness-frame, 6, also counting from the rear, cross one another infront of the said rod, and between the latter and the harness frames.When the shed-formation is reversed, the threads 64, a become unerossedand the threads a, a become crossed.

The illustrated arrangement has the advantage, further, that in applyingthe warps, harnesses, etc., to the loom the division of the threads toseparate them for the application of the left-hand rod 9 in therelations shown in Figs. 1 and 2 is readily effected, simply bydepressing the first and third harness-frames and raising the second andfourth. This separates the threads in pairs, as required accordance withthe invention. In case only :two har-' ness-frames, working. oppositely,should be employed, with the threads 61-, a, passing through the eyes ofthe heddles of one of the said frames, and the threads (4 a passingthrough the eyes of the hecldles of the other frame, the division of thewarp-l threads into pairs for the insertion of the rod 9 may be effectedby other methods known toweavers. More than two harness L i frames maybe grouped-together to move in unison, in which case the warp-threadswill be divided into more than four sets or series and the order ofdrawing-in through the eyes of the hecldles of the differentharnessframes will be correspondingly modified, but the generalarrangement of the warp threads in front of rod 9 willapproximate thatrepresented in thepresent drawings. I claim as my invention 1. Incombination, atransverse warp-support for the warp-threads in a loom,aleaserod in advance of said warp-support by which the warp-threadspassing over said warp-support in a single plane are divided by alter- 1nating groups into two planes, one whereof passes over the saidlease-rod and the other. below the same, a bank of drop-wires hung iiponalternatingwarp-threads adjacent the warpsupport, a second bank ofdrop-wires hung upon the remaining warp-threads in the lower plane ofwarp-threads adjacent the said lease-rod, and oppositely-workingharness-frames pertaining to opposite planes of a shed, said harness-frames having the threads composing each of the said groups drawn inalternating order through the heddle-eyes of the respectiveharness-frames so as to bedivided between the said opposite shed-planes.

2. In combination, a transverse warp-support for the warp-threads inaloom, a leaserod in advance of said warp-support by. which thewarp-threads passing over said warp-support in a single plane aredivided by pairs into two planes, one whereof passes over the saidlease-rod and the otherbelow the same, a bank of drop-wires hung uponalternating pairs of the warp-threads adjacent the warp-support, asecond bank of drop-wires hung upon the warp-threads of the remainingpairs in the lower plane of warp-threads adjacent thesaid lease-rod,

1,239,792 and oppositely-working harness-frames pertaining to oppositeplanes of a shed, said harness-frames having the threads composing eachof the said pairs drawn in alternating order through the heddle-eyes ofthe respective harness-frames so as to be divided between the saidopposite shed-planes.

In testimony whereof I aflix my signature 1n presence of two wltnesses.

SIME O N S. JACKSON. WVitnesses:

CHAS. F. RANDALL, ELLEN 0. SPRING.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

